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Structural features of acidic fluorophosphatozirconates (hafnates) from the 19F, 31P, 1H NMR data

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Abstract

Fluorophosphatometallates with the composition K3H3Zr3F3(PO4)5, Rb3H3Zr3F3(PO4)5, Rb3H3Hf3F3(PO4)5, CsH2Hf2F2(PO4)3∙2H2O are studied by 31P, 19F, and 1H NMR. It is found that protons enter in the composition of hydrophosphate groups and fluorine atoms occupy the terminal sites in the tetravalent metal environment. Schemes of the crystal structure of fluorophosphatometallates are proposed. It is established that in CsH2Hf2F2(PO4)3∙2H2O water molecules are bonded to the phosphate group proton via a strong hydrogen bond and are characterized by a low energy barrier of molecular motions.

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Authors and Affiliations

  1. Institute of Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, Russia

    A. B. Slobodyuk & V. Ya. Kavun

  2. Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Scientific Center, Russian Academy of Sciences, Apatity, Russia

    M. M. Godneva

Authors
  1. A. B. Slobodyuk
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  2. V. Ya. Kavun
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  3. M. M. Godneva
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Correspondence to M. M. Godneva.

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Devoted to the 80th anniversary of Professor S. P. Gabuda

Translated from Zhurnal Strukturnoi Khimii, Vol. 57, No. 2, pp. 353-358, March-April, 2016.

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Slobodyuk, A.B., Kavun, V.Y. & Godneva, M.M. Structural features of acidic fluorophosphatozirconates (hafnates) from the 19F, 31P, 1H NMR data. J Struct Chem 57, 338–344 (2016). https://doi.org/10.1134/S0022476616020141

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  • DOI: https://doi.org/10.1134/S0022476616020141

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